Buff Support
I think one of the main things that would make the support role better would be to buff their income and itemization. There are a few things I can think of to make this happen. One is making a summoner spell that would only be useful to supports, just like smite is exclusively useful to junglers. The summoner would allow the support, and only the support to buy gold income items geared towards the support role. These items
would get a considerably large income buff to what is offered currently. I would also suggest nerfing the stats on these a little bit, buffing their passives, and lowering their price a bit. The reason would be to deter other roles from abusing this. Another thing that would benefit support would be to give them their own update that would provide reworks, new items, item changes, and perhaps some other changes.
P.S I just thought of a summoner that would allow supports to get an extra item slot that could only contain an elixir, Riot would have to make some new ones for supports, but basically these elixirs would give supports temporary _**super buffs **_for sticky/dire situations. AP elixir, Tank elixir, Utility elixir.